"In my experience, children diagnosed as having Attention Deficit Syndrome (ADS) commonly suffer from allergic conditions"

http://www.naturalmedicine.co.za/sajnm_main/article.php?story=20031103082201616

" In my experience, children diagnosed as having Attention Deficit Syndrome (ADS) commonly suffer from allergic conditions which add to the problems they have with concentration. Ritalin is commonly prescribed, but although this slows down the hyperactive state, it tends to impair intellectual capacity.^1,2 This is unfortunate as both the hyperactive state and the allergies can often be remedied by identifying and avoiding the foods causing the symptoms of ADS. Moreover, the diagnosis of ADS may have a permanent psychological effect on hyperactive children. A great deal of anguish could be avoided by the simple expedient of finding the triggers."